College of Mechanical and Vehicle Engineering, Chongqing University, Chongqing, China.
Ergonomics. 2023 Dec;66(12):1854-1867. doi: 10.1080/00140139.2023.2168064. Epub 2023 Jan 19.
Biodynamic modelling of seat-occupant systems can assist in seat comfort design. A finite element (FE) model of the seated human body, including detailed modelling of the lumbar spine, was established to reflect the human response to vibration and biodynamic response of the lumbar spine under whole-body vibration (WBV). The lumbar spine model was established and validated against the results and calculated data. The posture of the lumbar spine was adjusted according to the radiological research results, and the adjusted model was combined to establish a FE model of the seated human body. The present seated human model with backrest inclination angles of 10, 20, and 30°, validated by comparing the measured apparent mass and seat-to-lumbar spine transmissibility, was used to calculate the biodynamic response of the lumbar spine with three inclined backrests under WBV. The results showed that the model could characterise the apparent mass, seat-to-lumbar spine transmissibility, and the biodynamic response of the lumbar spine. Biodynamic models can represent dynamic characteristics of the human body exposed to vibration and assist in seat comfort design. The three-dimensional FE model of the human body can be used to explore the human response to vibration and the biodynamic response of the lumbar spine under WBV.
座垫-人体系统的动力建模有助于座椅舒适性设计。建立了包含详细腰椎模型的坐姿人体有限元（FE）模型，以反映人体对振动的响应和全身振动（WBV）下腰椎的动力响应。根据放射学研究结果调整腰椎模型的姿势，并将调整后的模型组合起来，建立坐姿人体的 FE 模型。通过比较测量的表观质量和座椅-腰椎传递率，验证了带有 10°、20°和 30°靠背倾斜角的坐姿人体模型，并用其计算 WBV 下三种靠背倾斜角度下腰椎的动力响应。结果表明，该模型能够描述表观质量、座椅-腰椎传递率和腰椎的动力响应。动力模型可以代表人体暴露于振动时的动态特性，并有助于座椅舒适性设计。人体的三维 FE 模型可用于研究人体对振动的响应和 WBV 下腰椎的动力响应。
